https://doi.org/10.1051/epjconf/20135918003
Efficient multi-keV X-ray generation from high-contrast laser plasma interaction
1 Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
2 Quantum Beam Science Directorate, Kansai Photon Science Institute Quantum Beam Science Directorate, Kansai Photon Science Institute , JAEA, Kyoto 619-0215, Japan
3 Institute for Laser Technology, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
4 Institute of Applied Physics and Computational Mathematics, PO Box 8009, Beijing 100088, China
5 Laser Research Center for Molecular Science, Institute for Molecular Science, National Institute of Natural Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan
a e-mail: zhang-z@ile.osaka-u.ac.jp
Published online: 15 November 2013
Kα line emission from Mo was experimentally and theoretically studied using clean, ultrahigh-intensity femtosecond laser pulses. The absolute yields of Kα x-rays at 17 keV from Mo were measured as a function of the laser pulse contrast ratio and irradiation intensity. Significantly enhanced Kα yields were obtained by employing high contrast ratio at optimum irradiance. Conversion efficiencies of 4.28 × 10−5/sr, the highest values obtained to date, was demonstrated with contrast ratios in the range of 10−10 to 10−11.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
